Vacuum breaker valve



July 23, 1940. M. CALLEJO VACUUM BREAKER VALVE Filed Sept. 28, 1938 & V

INVENTOR. M0055 T0 61444510 ATTORNEYS viv vg I m Patented July 23, 1940 UNITED; STATES- VACUUM BREAKER? VALVE- Modesto Callejo,- Bronx, N. Y.,. assignor toBiddro Manufacturing Co. Inc., MountVernon N; Y.,' a corporation of New York Application September28, 1938; Scrial No; 232,047 l 2 Claims.

This invention relates to improvements-"in valves and has particular reference to a vacuum breaker valve especially adapted for use in water distribution systems;

An object of the-invention'is to provide an improved valve of simple, practicaland economical construction which will effectively "prevent sy-' phoning of water from a fixture 'in a distribution system into the mainsupply line thereof-whena 1o" vacuum occurs therein."

Another object'is to provide a vacuum breaker with a sliding valve operable in a sleeve bearing ,formed in one section of the structure and extending into another'section' thereof; said valve libeing equippedwith means to divert any -sediment" in'the supply line, to which the structure is connected, from the space between said valve when taken -'in connection with the accompany in'g drawing which-illustrates a preferred ems zs bodiment of the inventive'ideaa In the drawing:

Figure 1- a diagrammatic viewypartlyin sec-' tion, of a portion of a water distribution system including-a number of' fixtures of various type and in association with some of which is illustrated vacuum breakers embodying features of the present invention.

Figure 2 is a vertical sectional view through one form of a Vacuum breaker valve showing the 5 sliding valve thereof in the position it assumes when water in the distribution system is flowing through the structure.

Figure 3 is a view similar to Figure 2 showing the position of the valve when the inlet of the structure is closed.

Figure 4 is a transverse section on the line 44 of Figure 3.

Figure 5 is a similar view on the line 5-5 of Figure 3.

In Figure l of the drawing there is partially illustrated a water distribution system in which a plurality of fixtures, such as a drinking fountain l2, basin I3, toilet l4, and bathtub I5, are located on different floors of a building. The water supply for these various fixtures is conveyed thereto through a main riser pipe l6 connected to a suitable source (not shown) from which the water supply is controlled by a master valve 11. The supply for the lower fixtures I2 and I3 is conveyed thereto through a valve conthe' fixtures i4 and l5,-there' are provided'branch pipes 19 and 2'B,-respectively, withstandard controlled pipe is in the customary manner; For'" trol valvesll and 22 for governing the flow from I the riser iii to said fixtures. In the use of fix' tures such as shown at M and I5,'-there is a possibilitybf waste water being syphoned therefrom into the riser I6 when a temporary vacuum occurs in the latter, with the result that such waste water maybe subsequently conveyed to otherfixturesin the system." In'i order to avoidthis contingency'a vacuum breaker valvestructure 'is interposed between'eachof'the fixtures- Hl and l5 and thecontrol valves-therefor; the construction of said vacuum breaker being such that whenthe valve thereof is operated by'pres- 1 sure of water in the riser IS a free flo'w'of the supply to-the'fixture will be had. However, when said supply is shut ofi, or a vacuum occurs in the riser, said sliding valve will operate to close com-' munication between'the' fixtures'and-the riser-- so as to eliminate any possibility of waste waterin the fixtures being syphoned back into the riser.

control the admission of air into the riser and thus aid in breaking any temporary vacuum in the'latte'r. For this purposeeach-of the vacuum breaker structures; :shown in Figure "1, i has connectedthereto 'at oneend an =air=intakepipe 23 the other end of which is joined to a vertical drain pipe 24. The upper end of the latter pipe extends above the topmost fixture in the system and is open to the atmosphere while the lower end of said pipe may be disposed below a drain 25. The pipes 23 also act as an overflow for any water which may pass the vacuum breaker struc ture without flowing into the fixture and such overflow will be conveyed through said pipes 23 into the drain pipe 24.

The vacuum breaker is shown as comprising a body consisting of separable sections, generally indicated at 26 and 21, connected by the screw threads 28 formed interiorly of the section 26 and on the extension 29 of the section 21. The section 26 is reduced at its lower end and exteriorly screw threaded for coupling to the control valve 2| as illustrated in connection with the fixture M, or for direct connection to the riser l6 as in the case of the fixture Hi. In the intermediate reduced portion 30 of the section 26 there is provided a valve seat 3| located at the inner end of the inlet 32 of the structure and adapted'to be engaged by the sliding valve 33, later to be described in detail, when there is no Saidvacuum breaker structure is also utilized to pressure of liquid in the inlet or when a temporary vacuum has occurred in the riser IS.

The upper section 21 of the structure is provided with an internally threaded outlet 34 adapted for connection with the fixture with which the structure is associated, and said section is further provided with an externally threaded air inlet and overflow connection 35 which is in.

direct communication with the outlet 34 when 1 i the sliding valve 33 is in the lowered position of Figure 3, and which is shut off from said outlet by said valve when the latter is under pressure- I The .sliding valve 33, is preferably of hollow tubular formation closed at its upper "end 38 for engagement with the valve seat 39 of the connec- 2 tion 35, and open at its lower end 40 for the entrance of liquid under pressure into the sliding valve to raise the same to the position of Figure 2 and thus permit the liquid to flow through the ducts 31 into the outlet 34. Said .ducts are such msize and number as to allow the passage into the outlet 34 of only the required amount of liquid irrespective of the amount of pressure in the.

riser l6 and should there be any overflow entering the outlet 34 which will cause the valve 33 to (she lowered, such overflow will then pass out through the connection 35 to the drain 24.

In the use of vacuum breakers in water dis-' tribution systems, it has been found that the ef ficiency of such breakers sooner or laterbecomes 4Q,; ;impaired due to a gradual accumulation of sediment, such as rust, about the movable parts. of the breaker. As a result of such accumulation,

saidmovable parts do not operate instantly upon occurrence of a vacuum in the supply line and 452511116161 such circumstances said vacuum is likely to.

syphon Waste water into said line before themovable valve of the breaker can properly operate.-

To prevent such a contingency, the valve 33of the present invention is designed so that the liquid entering the inlet 32, and any sediment which may be carried therewith, is diverted from the space between said valve 33 and the in terior surface of the bearing 36, thus insuring against any accumulation of sediment in said space which would otherwise impair the free and proper sliding movements of the valve. Such diversion of the water and sediment is accomplished by providing the lower end portion 40 of the valve 33 with a laterally extending annular flange 4| which underlies the lower end of the bearing- 36 and is provided with an upwardly beveled deflecting surface 42 against which the inflowing liquid and any sediment therein impinges so as to be deflected outwardly and thereby caused to passthrough the ducts 31 instead of entering the space between the valve and its bearing. 1 I What is claimed is:

' 1. In a vacuum breaker valve for use in water distribution systems, a valve body comprising separable sections one of which is provided with an inlet, an outlet and an overflow connection formed in the other section, an extension onthe latter section projecting into thefirst named section and constituting a sleeve bearing, ducts formed in said extension for establishing com-.

munication between said inlet and outlet, and a slidingvalve mounted in said bearing for controlling communication between said inlet, outlet and overflow connection, said valve having means thereon for preventing passage-of sediment into the space between saidbearing and valve.

2. Ina vacuum breaker valve for use in water distribution systems, 'a valve body comprising separable sections one of which isprovidedwith" an inlet, an outlet and an overflow connection formed in the other section, an extension-on the latter section projecting into the first named section and constitutinga sleeve bearing, ducts,

formed in said extension for establishing communication between said inlet and outlet, and a sliding valve mounted in said bearing for, controlling communicationbetween said inlet, outlet and overflow connection, said valve having a flange formed with a beveled deflecting surface against which liquid entering said inlet impinges.

MODEsTQ CALLE'JO. 

